The front seat heater control unit does not turn on the front seat heater until the seat core temperature is 185 °F (85 °C) or less. Make sure the seat core temperature is below 185 °F (85 °C) before troubleshooting.
DTC Description
DTC
B1C63 Passenger's heater current abnormal low
1.
Problem verification:
Problem verification
?1.
Clear the DTCs with the HDS.
?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
?3.
Check for DTCs with the HDS.
DTC Description
DTC
B1C63 Passenger's heater current abnormal low
Is DTC B1C63 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
DTC check:
DTC check
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
Front passenger's seat heater connector A (4P)
?3.
Connect terminals A and B with a jumper wire.
Terminal A
Front passenger's seat heater connector A (4P) (female terminals) No. 3:
Terminal B
Body ground
?4.
Turn the vehicle to the ON mode.
?5.
Clear the DTCs with the HDS.
?6.
Check for DTCs with the HDS.
DTC Description
DTC
B1C63 Passenger's heater current abnormal low
Is DTC B1C63 indicated?
YES
Repair an open or high resistance in the AS H/SEAT LO RLY COM wire.?
